Oil is easy to fix, drain out the old, flush with Kerosene or what ever cleaner you like. drain out and let drain over night.
Now with the top caps off the forks, springs out, compress forks. add about 8 ounces of oil. This is too much but soon to be right.
Take a few feet of clear hose, Put a zip tie 6 inches from one end. Put this six inch end down into the forks. I use a Miti Vac tool hooked to this hose to draw out the oil above the end of the hose. You can use any method to apply vacuum to the hose, even by mouth. Not to tasty but works.
This is the 6 inch down method of fork oil setting. This improves fork action by giving a bit of an air shock effect. This helps reduce brake dive, as well as firmer action.
Now extend the forks install the springs and caps, or new springs.
You can experiment with different oil weights to see which feels best to you.
One more thing, before replacing the springs you can try adding spacers for the springs. I'm not sure just how your forks are set up. My 75 has a steel spacer on top of the spring. You can make spacers from PVC pipe. Cut a set 1/2 longer than the spacer you have. A set at 3/4 inch longer. Maybe even an inch longer. Try each length of spacer. You may find that works. Just don't go too far, don't want to get spring bind. This is when a spring compresses till the turns touch. This make the spring just a steel tube. Ride gets rough.
Leo
